检查对象创建后空 [英] check for null after object creation

问题描述

我创建一个新的对象

myobject t = new myobject();

我应该检查下一行的空引用，如果新的成功？

should I check on the next line for null reference , if the new succeeded ?

if (null != t)

或者我可以肯定，这个对象肯定会不同，那么空...

or I can be sure that this object for sure will be different then null ...

感谢。

推荐答案

据的 C＃的文档，如果新未能成功分配空间用于新的对象实例，一个 OutOfMemoryException异常将被抛出。因此，有没有必要做一个明确的检查空。

According to the C# documentation, if new fails to successfully allocate space for a new object instance, an OutOfMemoryException will be thrown. So there's no need to do an explicit check for null.

如果你想检测的情况下，其中新未能分配一个新的对象，你可能想要做的是这样的：

If you are trying to detect cases where new has failed to allocate a new object, you might want to do something like:

try {
    myobject t = new myobject();
    //do stuff with 't'
}
catch (OutOfMemoryException e) {
    //handle the error (careful, you've run out of heap space!)
}

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